Finding the Fourth Proportional to 118,123.55, 177,221.10 and 42,212.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,123.55 : 177,221.10 = 42,212.15 : x
2. Step 2: Convert to fraction form
   118,123.55/177,221.10 = 42,212.15/x
3. Step 3: Cross multiply
   118,123.55x = 177,221.10 × 42,212.15
4. Step 4: Simplify right side
   118,123.55x = 7,480,883,656.37
5. Step 5: Solve for x
   x = 7,480,883,656.37/118,123.55
6. Step 6: Final answer
   x = 63,331.01